Question: the shankandfoot system during walking is shown in the figure...
The shank-and-foot system during walking is shown
in the figure to the right. A force J and a moment M
from the human body are transmitted to the knee joint
K. Mass of the shank is 3.75 kg and its weight S is
acting at point A. Mass of the foot is 0.75 kg and its
weight F is acting at point B. The resultant reaction
force R acts at H at an angle α as shown in the figure.
Given that the shank-and-foot system is in
(a) Write down force equilibrium equations in the xand
(b) Write down the moment equilibrium equation about
the heel H.
(c) Calculate the reaction force R, angle α and moment M.
(Take the gravitational acceleration g = 10 m/s2)